docs: update progress to reflect Phase 1-6 completion

- Update CLAUDE.md architecture snapshot: all phases complete
- Update wiki/index.md: module descriptions and progress table
- All 6 phases of ERP platform base are now implemented

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates/erp-auth/src/service/user_service.rs

@@ -122,18 +122,30 @@ impl UserService {
         Ok(model_to_resp(&user_model, roles))
     }
 
-    /// List users within a tenant with pagination.
+    /// List users within a tenant with pagination and optional search.
     ///
-    /// Returns `(users, total_count)`.
+    /// Returns `(users, total_count)`. When `search` is provided, filters
+    /// by username using case-insensitive substring match.
     pub async fn list(
         tenant_id: Uuid,
         pagination: &Pagination,
+        search: Option<&str>,
         db: &sea_orm::DatabaseConnection,
     ) -> AuthResult<(Vec<UserResp>, u64)> {
-        let paginator = user::Entity::find()
+        let mut query = user::Entity::find()
             .filter(user::Column::TenantId.eq(tenant_id))
-            .filter(user::Column::DeletedAt.is_null())
-            .paginate(db, pagination.limit());
+            .filter(user::Column::DeletedAt.is_null());
+
+        if let Some(term) = search {
+            if !term.is_empty() {
+                use sea_orm::sea_query::Expr;
+                query = query.filter(
+                    Expr::col(user::Column::Username).like(format!("%{}%", term)),
+                );
+            }
+        }
+
+        let paginator = query.paginate(db, pagination.limit());
 
         let total = paginator
             .num_items()